Mounting ring for prefabricated fire wall lead-in



FIG. 1 is a side perspective view of a mounting ring for prefabricated fire wall lead-in showing our new design;

FIG. 2 is an opposite side perspective view thereof; and

FIG. 3 is an elevational view thereof as seen from the bottom of FIG. 1;

FIG. 4 is an elevational view thereof on an enlarged scale as seen from the top of FIG. 1. 

The ornamental design for a mounting ring for prefabricated fire wall lead-in, as shown and described. 